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Diffstat (limited to 'src/proguard/ClassSpecificationVisitorFactory.java')
| -rw-r--r-- | src/proguard/ClassSpecificationVisitorFactory.java | 523 |
1 files changed, 0 insertions, 523 deletions
diff --git a/src/proguard/ClassSpecificationVisitorFactory.java b/src/proguard/ClassSpecificationVisitorFactory.java deleted file mode 100644 index b403dde..0000000 --- a/src/proguard/ClassSpecificationVisitorFactory.java +++ /dev/null @@ -1,523 +0,0 @@ -/* - * ProGuard -- shrinking, optimization, obfuscation, and preverification - * of Java bytecode. - * - * Copyright (c) 2002-2014 Eric Lafortune (eric@graphics.cornell.edu) - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the Free - * Software Foundation; either version 2 of the License, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. - * - * You should have received a copy of the GNU General Public License along - * with this program; if not, write to the Free Software Foundation, Inc., - * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - */ -package proguard; - -import proguard.classfile.attribute.annotation.visitor.*; -import proguard.classfile.attribute.visitor.AllAttributeVisitor; -import proguard.classfile.visitor.*; - -import java.util.List; - -/** - * This factory creates visitors to efficiently travel to specified classes and - * class members. - * - * @author Eric Lafortune - */ -public class ClassSpecificationVisitorFactory -{ - /** - * Constructs a ClassPoolVisitor to efficiently travel to the specified - * classes and class members. - * - * @param keepClassSpecifications the list of KeepClassSpecification - * instances that specify the classes and - * class members to visit. - * @param classVisitor the ClassVisitor to be applied to matching - * classes. - * @param memberVisitor the MemberVisitor to be applied to matching - * class members. - * @param shrinking a flag that specifies whether the visitors - * are intended for the shrinking step. - * @param optimizing a flag that specifies whether the visitors - * are intended for the optimization step. - * @param obfuscating a flag that specifies whether the visitors - * are intended for the obfuscation step. - */ - public static ClassPoolVisitor createClassPoolVisitor(List keepClassSpecifications, - ClassVisitor classVisitor, - MemberVisitor memberVisitor, - boolean shrinking, - boolean optimizing, - boolean obfuscating) - { - MultiClassPoolVisitor multiClassPoolVisitor = new MultiClassPoolVisitor(); - - if (keepClassSpecifications != null) - { - for (int index = 0; index < keepClassSpecifications.size(); index++) - { - KeepClassSpecification keepClassSpecification = - (KeepClassSpecification)keepClassSpecifications.get(index); - - if ((shrinking && !keepClassSpecification.allowShrinking) || - (optimizing && !keepClassSpecification.allowOptimization) || - (obfuscating && !keepClassSpecification.allowObfuscation)) - { - multiClassPoolVisitor.addClassPoolVisitor( - createClassPoolVisitor(keepClassSpecification, - classVisitor, - memberVisitor)); - } - } - } - - return multiClassPoolVisitor; - } - - - /** - * Constructs a ClassPoolVisitor to efficiently travel to the specified - * classes and class members. - * - * @param classSpecifications the list of ClassSpecification instances - * that specify the classes and class members - * to visit. - * @param classVisitor the ClassVisitor to be applied to matching - * classes. - * @param memberVisitor the MemberVisitor to be applied to matching - * class members. - */ - public static ClassPoolVisitor createClassPoolVisitor(List classSpecifications, - ClassVisitor classVisitor, - MemberVisitor memberVisitor) - { - MultiClassPoolVisitor multiClassPoolVisitor = new MultiClassPoolVisitor(); - - if (classSpecifications != null) - { - for (int index = 0; index < classSpecifications.size(); index++) - { - ClassSpecification classSpecification = - (ClassSpecification)classSpecifications.get(index); - - multiClassPoolVisitor.addClassPoolVisitor( - createClassPoolVisitor(classSpecification, - classVisitor, - memberVisitor)); - } - } - - return multiClassPoolVisitor; - } - - - /** - * Constructs a ClassPoolVisitor to efficiently travel to the specified - * classes and class members. - * - * @param keepClassSpecification the specifications of the class(es) and - * class members to visit. - * @param classVisitor the ClassVisitor to be applied to - * matching classes. - * @param memberVisitor the MemberVisitor to be applied to - * matching class members. - */ - public static ClassPoolVisitor createClassPoolVisitor(KeepClassSpecification keepClassSpecification, - ClassVisitor classVisitor, - MemberVisitor memberVisitor) - { - // If specified, let the class visitor also visit the descriptor - // classes. - if (keepClassSpecification.markDescriptorClasses && - classVisitor != null) - { - memberVisitor = memberVisitor == null ? - new MemberDescriptorReferencedClassVisitor(classVisitor) : - new MultiMemberVisitor(new MemberVisitor[] - { - memberVisitor, - new MemberDescriptorReferencedClassVisitor(classVisitor) - }); - } - - // Don't visit the classes if not specified. - if (!keepClassSpecification.markClasses && - !keepClassSpecification.markConditionally) - { - classVisitor = null; - } - - // If specified, let the marker visit the class and its class - // members conditionally. - if (keepClassSpecification.markConditionally) - { - // Combine both visitors. - ClassVisitor composedClassVisitor = - createCombinedClassVisitor(keepClassSpecification, - classVisitor, - memberVisitor); - - // Replace the class visitor. - classVisitor = - createClassMemberTester(keepClassSpecification, - composedClassVisitor); - - // Discard the member visitor, because it has already been included. - memberVisitor = null; - } - - return createClassPoolVisitor((ClassSpecification)keepClassSpecification, - classVisitor, - memberVisitor); - } - - - /** - * Constructs a ClassPoolVisitor to efficiently travel to the specified - * classes and class members. - * - * @param classSpecification the specifications of the class(es) and class - * members to visit. - * @param classVisitor the ClassVisitor to be applied to matching - * classes. - * @param memberVisitor the MemberVisitor to be applied to matching - * class members. - */ - public static ClassPoolVisitor createClassPoolVisitor(ClassSpecification classSpecification, - ClassVisitor classVisitor, - MemberVisitor memberVisitor) - { - // Combine both visitors. - ClassVisitor composedClassVisitor = - createCombinedClassVisitor(classSpecification, - classVisitor, - memberVisitor); - - // By default, start visiting from the named class name, if specified. - String className = classSpecification.className; - - // Although we may have to start from the extended class. - String extendsAnnotationType = classSpecification.extendsAnnotationType; - String extendsClassName = classSpecification.extendsClassName; - - // If wildcarded, only visit classes with matching names. - if (className != null && - (extendsAnnotationType != null || - extendsClassName != null || - containsWildCards(className))) - { - composedClassVisitor = - new ClassNameFilter(className, composedClassVisitor); - - // We'll have to visit all classes now. - className = null; - } - - // If specified, only visit classes with the right annotation. - String annotationType = classSpecification.annotationType; - - if (annotationType != null) - { - composedClassVisitor = - new AllAttributeVisitor( - new AllAnnotationVisitor( - new AnnotationTypeFilter(annotationType, - new AnnotatedClassVisitor(composedClassVisitor)))); - } - - // If specified, only visit classes with the right access flags. - if (classSpecification.requiredSetAccessFlags != 0 || - classSpecification.requiredUnsetAccessFlags != 0) - { - composedClassVisitor = - new ClassAccessFilter(classSpecification.requiredSetAccessFlags, - classSpecification.requiredUnsetAccessFlags, - composedClassVisitor); - } - - // If it's specified, start visiting from the extended class. - if (extendsAnnotationType != null || - extendsClassName != null) - { - // Start visiting from the extended class. - composedClassVisitor = - new ClassHierarchyTraveler(false, false, false, true, - composedClassVisitor); - - // If specified, only visit extended classes with the right annotation. - if (extendsAnnotationType != null) - { - composedClassVisitor = - new AllAttributeVisitor( - new AllAnnotationVisitor( - new AnnotationTypeFilter(extendsAnnotationType, - new AnnotatedClassVisitor(composedClassVisitor)))); - } - - // If specified, only visit extended classes with matching names. - if (extendsClassName != null) - { - // If wildcarded, only visit extended classes with matching names. - if (containsWildCards(extendsClassName)) - { - composedClassVisitor = - new ClassNameFilter(extendsClassName, - composedClassVisitor); - } - else - { - // Start visiting from the named extended class. - className = extendsClassName; - } - } - } - - // If specified, visit a single named class, otherwise visit all classes. - return className != null ? - (ClassPoolVisitor)new NamedClassVisitor(composedClassVisitor, className) : - (ClassPoolVisitor)new AllClassVisitor(composedClassVisitor); - } - - - /** - * Constructs a ClassVisitor to efficiently travel to the specified - * classes and class members. - * - * @param classSpecification the specifications of the class(es) and class - * members to visit. - * @param classVisitor the ClassVisitor to be applied to matching - * classes. - * @param memberVisitor the MemberVisitor to be applied to matching - * class members. - */ - private static ClassVisitor createCombinedClassVisitor(ClassSpecification classSpecification, - ClassVisitor classVisitor, - MemberVisitor memberVisitor) - { - // Don't visit any members if there aren't any member specifications. - if (classSpecification.fieldSpecifications == null && - classSpecification.methodSpecifications == null) - { - memberVisitor = null; - } - - // The class visitor for classes and their members. - MultiClassVisitor multiClassVisitor = new MultiClassVisitor(); - - // If specified, let the class visitor visit the class itself. - if (classVisitor != null) - { - // This class visitor may be the only one. - if (memberVisitor == null) - { - return classVisitor; - } - - multiClassVisitor.addClassVisitor(classVisitor); - } - - // If specified, let the member info visitor visit the class members. - if (memberVisitor != null) - { - ClassVisitor memberClassVisitor = - createClassVisitor(classSpecification, memberVisitor); - - // This class visitor may be the only one. - if (classVisitor == null) - { - return memberClassVisitor; - } - - multiClassVisitor.addClassVisitor(memberClassVisitor); - } - - return multiClassVisitor; - } - - - /** - * Constructs a ClassVisitor to efficiently travel to the specified class - * members. - * - * @param classSpecification the specifications of the class members to visit. - * @param memberVisitor the MemberVisitor to be applied to matching - * class members. - */ - private static ClassVisitor createClassVisitor(ClassSpecification classSpecification, - MemberVisitor memberVisitor) - { - MultiClassVisitor multiClassVisitor = new MultiClassVisitor(); - - addMemberVisitors(classSpecification.fieldSpecifications, true, multiClassVisitor, memberVisitor); - addMemberVisitors(classSpecification.methodSpecifications, false, multiClassVisitor, memberVisitor); - - // Mark the class member in this class and in super classes. - return new ClassHierarchyTraveler(true, true, false, false, - multiClassVisitor); - } - - - /** - * Adds elements to the given MultiClassVisitor, to apply the given - * MemberVisitor to all class members that match the given List - * of options (of the given type). - */ - private static void addMemberVisitors(List memberSpecifications, - boolean isField, - MultiClassVisitor multiClassVisitor, - MemberVisitor memberVisitor) - { - if (memberSpecifications != null) - { - for (int index = 0; index < memberSpecifications.size(); index++) - { - MemberSpecification memberSpecification = - (MemberSpecification)memberSpecifications.get(index); - - multiClassVisitor.addClassVisitor( - createClassVisitor(memberSpecification, - isField, - memberVisitor)); - } - } - } - - - /** - * Constructs a ClassVisitor that conditionally applies the given - * ClassVisitor to all classes that contain the given class members. - */ - private static ClassVisitor createClassMemberTester(ClassSpecification classSpecification, - ClassVisitor classVisitor) - { - // Create a linked list of conditional visitors, for fields and for - // methods. - return createClassMemberTester(classSpecification.fieldSpecifications, - true, - createClassMemberTester(classSpecification.methodSpecifications, - false, - classVisitor)); - } - - - /** - * Constructs a ClassVisitor that conditionally applies the given - * ClassVisitor to all classes that contain the given List of class - * members (of the given type). - */ - private static ClassVisitor createClassMemberTester(List memberSpecifications, - boolean isField, - ClassVisitor classVisitor) - { - // Create a linked list of conditional visitors. - if (memberSpecifications != null) - { - for (int index = 0; index < memberSpecifications.size(); index++) - { - MemberSpecification memberSpecification = - (MemberSpecification)memberSpecifications.get(index); - - classVisitor = - createClassVisitor(memberSpecification, - isField, - new MemberToClassVisitor(classVisitor)); - } - } - - return classVisitor; - } - - - /** - * Creates a new ClassVisitor to efficiently travel to the specified class - * members. - * - * @param memberSpecification the specification of the class member(s) to - * visit. - * @param memberVisitor the MemberVisitor to be applied to matching - * class member(s). - */ - private static ClassVisitor createClassVisitor(MemberSpecification memberSpecification, - boolean isField, - MemberVisitor memberVisitor) - { - String name = memberSpecification.name; - String descriptor = memberSpecification.descriptor; - - // If name or descriptor are not fully specified, only visit matching - // class members. - boolean fullySpecified = - name != null && - descriptor != null && - !containsWildCards(name) && - !containsWildCards(descriptor); - - if (!fullySpecified) - { - if (descriptor != null) - { - memberVisitor = - new MemberDescriptorFilter(descriptor, memberVisitor); - } - - if (name != null) - { - memberVisitor = - new MemberNameFilter(name, memberVisitor); - } - } - - // If specified, only visit class members with the right annotation. - if (memberSpecification.annotationType != null) - { - memberVisitor = - new AllAttributeVisitor( - new AllAnnotationVisitor( - new AnnotationTypeFilter(memberSpecification.annotationType, - new AnnotationToMemberVisitor(memberVisitor)))); - } - - // If any access flags are specified, only visit matching class members. - if (memberSpecification.requiredSetAccessFlags != 0 || - memberSpecification.requiredUnsetAccessFlags != 0) - { - memberVisitor = - new MemberAccessFilter(memberSpecification.requiredSetAccessFlags, - memberSpecification.requiredUnsetAccessFlags, - memberVisitor); - } - - // Depending on what's specified, visit a single named class member, - // or all class members, filtering the matching ones. - return isField ? - fullySpecified ? - (ClassVisitor)new NamedFieldVisitor(name, descriptor, memberVisitor) : - (ClassVisitor)new AllFieldVisitor(memberVisitor) : - fullySpecified ? - (ClassVisitor)new NamedMethodVisitor(name, descriptor, memberVisitor) : - (ClassVisitor)new AllMethodVisitor(memberVisitor); - } - - - // Small utility methods. - - private static boolean containsWildCards(String string) - { - return string != null && - (string.indexOf('!') >= 0 || - string.indexOf('*') >= 0 || - string.indexOf('?') >= 0 || - string.indexOf('%') >= 0 || - string.indexOf(',') >= 0 || - string.indexOf("///") >= 0); - } -} |